Transfer Case/PTO - Lubrication Requirements

89ford04

TRANSFER CASE-LUBRICATION REQUIREMENTS FOR VEHICLES EQUIPPED "DANA" POWER TAKE-OFF (PTO) UNITS

Article No. 89-6-19

LIGHT TRUCK: 1987-89 F-350


ISSUE: Warner 356 transfer case assemblies with "Dana" P.T.O. units require 4.8 quarts more oil (Dexron II ATF) than transfer cases without P.T.O's. Transfer cases equipped with P.T.O's that are operated under a continuous load in excess of 11 minutes may exhibit failures due to a low fill.

ACTION: When servicing transfer cases that have P.T.O's, refill the transfer case as described in the following service procedure.

FIGURE 1:

NOTE: SOME TRANSFER CASES HAVE A FILL PLUG LABELED "FOR P.T.O. FILL ONLY" ON THE FRONT OF THE CASE, FIGURE 1.

NOTE: CUSTOMERS SHOULD BE GIVEN A COPY OF THIS INFORMATION FOR FUTURE REFERENCE.

1. Locate the fill plug on the front of the transfer case labeled "FOR P.T.O. FILL ONLY", Figure 1. Fill oil to the level of this fill hole. If this fill hole does not exist, proceed to Step 2.

NOTE: THE UPPERMOST CAPSCREW ON THE OUTPUT SHAFT BEARING COVER OF THE P.T.O. SHOULD BE USED TO CHECK THE OIL LEVEL.

FIGURE 2:

2. Remove the uppermost capscrew ("A") on the output shaft bearing cover of the P.T.O., Figure 2.

FIGURE 3:

3. Remove the barbed fitting and breather hose from the P.T.O. shifter cover, Figure 3.
4. Add oil into the P.T.O. through the breather hole in the shifter cover until the oil begins to run out of the hole for the capscrew ("A").

5. Reinstall the capscrew in the output shaft bearing cover of the P.T.O.

6. Reinstall the barbed fitting and breather hose into the P.T.O. shift cover.

7. Make sure all the capscrews are properly tightened. Refer to the P.T.O. owner manual for the correct torque specification.

OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: INFORMATION ONLY
OASIS CODES: 5700, 5970